PBL加劲肋方钢管混凝土界面传力性能的有限元分析

A Finite Element Analysis of the Force-Conducting Performance of the Interface of the PBL Stiifening Rib of Rectangular Concrete-Filled Steel Tube

为探讨PBL加劲肋的方矩形钢混凝土界面抗剪粘结滑移的力学性能,研究PBL加劲肋对界面传力性能的影响以及PBL构件界面的传力规律。采用有限元分析软件ABAQUS对比了构件分别通过粘结作用和PBL键在剪力传递长度内应力的变化规律和传递效率。结果表明:PBL键在界面传力方面承担主要角色,在剪力传递长度内自然粘结作用和PBL的传力模式相同,界面应力的变化并不均匀,自然粘结作用的传力效率远小于PBL键。

j In order to study the mechanical performance of the interface of the PBL stiifening rib of rectangular concrete-filled steel tube such as anti-shear,bonding and sliding,the effect of the PBL stiifening rib on the force-conducting performance of the interface and the force-conducting law of the interface of the PBL members are studied in the paper. With the help of the finite element analysis software of ABAQUS^the law of the change in stress and the conducting efficiency of the members respectively through the bonding action and the PBL shear connector in the shear-conducting length are compared. The results show that the PBL shear connector plays an important role in the interface conducting forces, and both the natural bonding effect and the PBL have the same pattern in conducting forces within the shear-conducting length,but the change in the stress of the interface is found to be inconsistent. The conducting efficiency of the natural bonding effect is far less than that of the PBL shear connector.